Patent RU-2292356-C2 (RU)
Inventor: SAVATSKI BRJUS DZH
IPC: C08F4/42
Filed: 2003-12-08
Granted: 2007-01-27
Abstract: FIELD: chemical industry; methods of transition between the incompatible catalytic agents of the layer of the nuclei practically free from the contaminants. 
     SUBSTANCE: the invention is pertaining to the method of transition of the layer of the nuclei practically free from the contaminants from the first reaction of the polymerization to the second reaction of the polymerization incompatible with the first reaction of the polymerization in the gaseous-phase reactor. The invention describes the method of transition of the layer of the nuclei practically free from the contaminants from the first reaction of the polymerization with utilization of the first catalytic system for production of the first product of polymerization to the second reaction of the polymerization, in which they gain the second product of the polymerization, where the second reaction of the polymerization is incompatible with the first catalytic system for polymerization or the first product of the polymerization including the contaminants in the gaseous-phase reactor including:(a) realization of the sequential reactions of the polymerization in the gaseous-phase reactor after the first reaction of the polymerization with usage of the numerous catalytic systems, the numerous conditions in the reactor and the numerous torrents of the raw for production of the numerous products of the polymerization; (b) formation for each reaction of the polymerization of the layer of the nuclei practically free from the contaminants, which contains less than 100 particles per one million of the contaminants by means of removal of a part of the polymerization product from each reaction of the polymerization and the distillation or blowing out of the reactants and contaminants from each product of the polymerization; (c) the decontamination of the molecules of the catalytic agent grasped or contained in each polymeric product without a contact of the polymerization product with the surplus of the deactivator; (d) it is optional after the stage of the to conduct the distillation or blowing the reactants and contaminants out from each product of polymerization; (e)exercise storage of each layer of the nuclei practically non-containing contaminants separately in the storage container in the atmosphere of the dry inert gas for maintaining each layer of the nuclei practically non-containing contaminants; (f) stoppage of each sequential reaction of the polymerization; (g) removal of the contents of each sequential reaction of the polymerization from the gaseous-phase reactor so, that to prevent injection of the additional or essential quantity of the contaminants; (h) picking up the saved in the container layer of the nuclei practically free from the contaminants, which is compatible with the second reaction of the polymerization with respect to the product of polymerization or the catalytic system for the polymerization; (i) injection of the picked up practically non-containing contaminants layer of the nuclei in the gaseous-phase reactor so, that to prevent injection of the additional or essential quantities of the contaminants in the layer of the nuclei or in the reactor; (j) introduction of the second system of the raw in the gaseous-phase reactor; (k)introduction of the second catalytic system in the gaseous-phase reactor; and (l) realization of the second reaction of the polymerization. The technical result of the invention is reduction of the gaseous-phase reactor idle time. 
     EFFECT: the invention ensures reduction of the gaseous-phase reactor idle time. 
     13 cl, 7 dwg